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M M 'M the barrier island in Indian River County differ from the rates employed by the Hutchinson Island study. If that analysis finds that trip generation rates are lower, this may result in excess capacity on the principal thoroughfare system and allow for more development on the island. As part of the transportation impact analysis, the County must determine what improvements to the principal thoroughfare system are needed to accommodate the proposed level of growth and development for the island. The County must then either plan for the improvements or reduce the densities currently allowed in the Comprehensive Plan. With the 5000 trip excess capacity for Traffic Zone 1 using peak season Level of Service D and traffic generation rates, the additional residential development which could be accommodated in this area ranges from less than 700 units to more than 1400 units - depending upon the type of unit constructed. Either way, the allowable densities for that portion of the island would have the be substantially reduced until the capacity of the system is increased. Together, the existing and committed development for Traffic Zones 2, 3, and 4 exceed the capacity of the principal thoroughfare system by almost 5,000 trips at peak season Level of Service D using traffic generation rates. Improving the east and west intersections on the 17th Street Bridge approach, however, could potentially add 36,000 trips to the system's existing capacity. Such improvements could substantially affect development in those traffic zones. Instead of restricting development to one unit per buildable area, local governments in these traffic zones (Indian River County, Vero Beach, and Indian River Shores) could then accommodate between 4,000 and 9,000 additional units - the final number dependent upon the mix of housing types. Another action which must be taken by the County is the formulation of a capital improvement program. This must address improvements proposed for the island as well as the timing and means of funding for those improvements. Specifically, the County must identify transportation improvements, water and sewer system improvements, and all other capital improvements proposed for the island. The Hutchinson Island Plan requires the preparation of erosion control, wetland preservation, stormwater management, and dune preservation ordinances. Other issues which the County must address through regulation include beach lighting, shoreline access, shoreline alteration, habitat destruction, and water/wastewater standards. With its current set of codes and regulations, the County presently addresses a number of these issues. Adoption of the Tree Preservation Ordinance will give the County further regulatory authority in relation to these issues. Even with its existing codes and ordinances, however, the County may need to make minor revisions to its regulations. -7- 07 N O V 2 119 3 NOCK '5PAG.E471